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 * Copyright 2025 JetBrains s.r.o.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

package java.io;

import jdk.internal.ref.CleanerFactory;
import jdk.internal.ref.PhantomCleanable;

/**
 * An analog of {@link FileCleanable} that does nothing.
 * <p>
 * It exists only to fulfill an implicit contract that every {@link FileDescriptor}
 * from {@link RandomAccessFile} and classes like that
 * has a registered cleaner.
 * Some tests rely on this contract and fail without this class.
 */
class NoOpCleanable extends PhantomCleanable<FileDescriptor> {
    NoOpCleanable(FileDescriptor referent) {
        super(referent, CleanerFactory.cleaner());
    }

    @Override
    protected void performCleanup() {
        // Nothing.
    }
}
